CN209313480U - A kind of more mouthfuls of chargers with charging instruction - Google Patents
A kind of more mouthfuls of chargers with charging instruction Download PDFInfo
- Publication number
- CN209313480U CN209313480U CN201920132985.1U CN201920132985U CN209313480U CN 209313480 U CN209313480 U CN 209313480U CN 201920132985 U CN201920132985 U CN 201920132985U CN 209313480 U CN209313480 U CN 209313480U
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- Prior art keywords
- electrically connected
- power supply
- mouthfuls
- pnp triode
- current
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of more mouthfuls of chargers with charging instruction, it includes shell, the shell upper end is equipped with several USB interfaces, power conversion module and power supply circuit plate are equipped in the shell, the output end of the power conversion module is electrically connected with the input terminal of power supply circuit plate, several described USB interfaces are electrically connected with the output end of power supply circuit plate, several described USB interfaces have been electrically connected charging indication.The utility model structure is simple and detection charged state accuracy is high.
Description
Technical field
The utility model relates to a kind of charging units, more specifically to a kind of more mouthfuls of chargings with charging instruction
Device.
Background technique
Currently, requirement of the people for charger is also higher and higher, so individually connecing since the continuous of electronic equipment is popularized
The charger of mouth can no longer meet the demand of people, it is therefore desirable to which multiple USB are arranged in a kind of more mouthfuls of chargers, i.e. charger
Interface, to be simultaneously that multiple electronic equipments charge, to increase its functional and practicability.
In the prior art, charger generally can all be used for the instruction of charged state with indicator light, and indicating means has
It is a variety of, for example charged state is detected using MCU chip, although this detection method is able to detect accurately, but its production cost
It is higher, and production technology is also more complicated.
The Chinese patent of Publication No. CN205385300U discloses a kind of charging display circuit, passes through first point of setting
The resistance value of piezoresistance and the second divider resistance makes charge prepd when fully charged not yet, and the cut-off of NPN triode is connected to
Full electric indicator light between NPN triode collector and current-limiting resistance second end does not work, and PNP triode Q1 is connected, and is connected to
Charging indicator light between PNP triode Q1 emitter and current-limiting resistance second end is bright；When fully charged, NPN triode conducting,
Full electricity indicator light is bright, and the voltage of the first end of charging indicator light is equal to the pressure drop and NPN triode of full electric indicator light at this time
The sum of collector-emitter conduction voltage drop, then PNP triode Q1 ends, and charging indicator light does not work；Although it realizes inspection
Slowdown monitoring circuit structure is simple, but the indicator light of its display charging and full power state is used separately, if used on more mouthfuls of chargers,
Since USB interface is more, it is chaotic to be easy instruction state identification, in addition, its use two kinds of triodes to its divider resistance into
Row voltage detecting, if be bound on more mouthfuls of chargers, due to that each branch voltage can be made to have from general supply to each USB interface
It is reduced, detection voltage makes instruction state not accurate enough, the use of charged electronic equipment is influenced, it is therefore desirable to provide one kind
With accuracy is high, cost is lower and easily identifies more mouthfuls of chargers of the charging instruction of charged state.
Utility model content
The utility model overcomes the deficiencies in the prior art, provides a kind of more mouthfuls of chargers with charging instruction, makes
It obtains structure simply and detection charged state accuracy is high.
To achieve the goals above, the utility model uses following technical proposals:
A kind of more mouthfuls of chargers with charging instruction, it includes shell, and the shell upper end is equipped with several USB and connects
Mouthful, power conversion module and power supply circuit plate, the output end and power supply circuit of the power conversion module are equipped in the shell
The input terminal of plate is electrically connected, several described USB interfaces are electrically connected with the output end of power supply circuit plate, several described USB connect
Mouth has been electrically connected charging indication；The charging indication includes that PNP triode Q1, current-limiting resistance R1 and common cathode are double
Color diode D, the common cathode two-color diode include for control red light work first anode D1 and for controlling blue lamp work
One end second plate D2, the current-limiting resistance R1 of work is electrically connected with USB interface, the current-limiting resistance R1 other end with it is described
The base stage of PNP triode Q1, the base stage of the PNP triode Q1 draw a ground line, the collector of the PNP triode Q1
It is electrically connected with the first anode D1, the second plate D2 is electrically connected with current-limiting resistance R1 and power supply circuit plate, described total
The emitter of the minus earth of negative two-color diode D, the PNP triode Q1 is electrically connected with power supply circuit plate.
Preferably, the power conversion module is Switching Power Supply, and the hull outside is switched equipped with master control, the master control
Switch is electrically connected with the input terminal of the power conversion module.
Preferably, the shell uses aluminum alloy materials, and the shell side is provided with thermovent.
Preferably, the charging indication is additionally provided with fuse RT1, the one end the fuse RT1 and current-limiting resistance
Electrical connection, the fuse RT1 other end are electrically connected with the emitter of the PNP triode Q1.
Preferably, the common cathode two-color diode D is arranged in hull outside.
Compared with prior art, the utility model has the beneficial effects that
The utility model structure is simple, and cost is very low, double-colored by setting current-limiting resistance R1, PNP triode Q1 and common cathode
Diode D, when can not have battery insertion with USB interface, PNP triode Q1 base stage is high level, and PNP triode Q1 cut-off is not led
Logical, then first anode D1 does not have electric current to flow through, then the blue lamp of second plate D2 control lights；It is connect when there is charging unit to be inserted into USB
When mouthful charging, because there is electric current to flow through current-limiting resistance R1, voltage difference is formed at the both ends current-limiting resistance R1, this voltage difference allows PNP tri-
Pole pipe Q1 conducting, first anode D1 has electric current to flow through, so red light is lighted, and the wavelength of red light is longer than the wavelength of blue, and flows
The electric current for crossing first anode D1 is bigger than the electric current of second plate D2, so, at this point, to will appear red light bright by common cathode two-color diode D
It rises；When battery is fully charged, because there is lesser electric current to flow through current-limiting resistance R1, lesser voltage is formed on current-limiting resistance R1
Difference, this voltage difference cannot allow PNP triode Q1 to be connected, and since PNP triode Q1 is not turned on, so first anode D1 does not just have
There is electric current to flow through, then red light cannot be lighted, there is electric current to flow through second plate D2 at this time, so common cathode two-color diode D
Blue lamp is lighted.It can show corresponding USB interface charged state by a diode, reduce that diode uses
Number is more applicable in more mouthfuls of chargers so that cost reduces, and facilitates identification charged state, and improve detection using detection electric current
Accuracy.
Detailed description of the invention
Fig. 1 is a kind of explosive view of more mouthfuls of chargers of charging instruction of the utility model；
Fig. 2 is a kind of circuit diagram of the charging indication of more mouthfuls of chargers of charging instruction of the utility model.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and detailed description:
With reference to Fig. 1, a kind of more mouthfuls of chargers with charging instruction, it includes shell 1, and 1 upper end of shell is equipped with several
USB interface 2, several USB interfaces 2 are arranged in array, and power conversion module 4 and power supply circuit plate 3 are equipped in shell 1,
PCB circuit board can be used in power supply circuit plate 3, and the output end of power conversion module 4 is electrically connected with the input terminal of power supply circuit plate 3,
Several described USB interfaces 2 are electrically connected with the output end of power supply circuit plate 3, and power supply circuit plate 3 is for the transmission of each USB interface 2
For the electricity of charging, it is equipped with power supply module corresponding with each USB interface 2, power supply module can be used for being electrically integrated electricity
Road, several USB interfaces 2 have been electrically connected charging indication 30, after having charge prepd to have access USB interface 2, fill
Electric indicating circuit 30 can then detect the charged state of charge prepd, and charging indication 30 is arranged in power supply circuit plate 3.
In the present embodiment, with reference to Fig. 2, charging indication 30 includes PNP triode Q1, current-limiting resistance R1 and common cathode
Two-color diode D, common cathode two-color diode include for control red light work first anode D1 and for control blue lamp work
Second plate D2, the one end current-limiting resistance R1 is electrically connected with USB interface 2, and USB interface 2 also draws a ground line, current limliting electricity
The base stage of the R1 other end and the PNP triode Q1 is hindered, the base stage of PNP triode Q1 draws a ground line, PNP triode Q1's
Collector is electrically connected with first anode D1, and second plate D2 is electrically connected with current-limiting resistance R1 and power supply circuit plate 3, that is, is being filled
Electric appliance has current lead-through, and second plate is constantly on, the minus earth of common cathode two-color diode D, the hair of PNP triode Q1
Emitter-base bandgap grading is electrically connected with power supply circuit plate 3.
The working principle of the present embodiment is, by the way that current-limiting resistance R1, PNP triode Q1 and common cathode two-color diode D is arranged,
When can be inserted into USB interface 2 without battery, PNP triode Q1 base stage is high level, and PNP triode Q1 cut-off is not turned on, then the
One anode D1 does not have electric current to flow through, then the blue lamp of second plate D2 control lights；It charges when there is charging unit to be inserted into USB interface 2
When, because there is electric current to flow through current-limiting resistance R1, voltage difference is formed at the both ends current-limiting resistance R1, this voltage difference allows PNP triode Q1
Conducting, first anode D1 has electric current to flow through, so red light is lighted, and the wavelength of red light is longer than the wavelength of blue, and flows through first
The electric current of anode D1 is bigger than the electric current of second plate D2, so, at this point, common cathode two-color diode D will appear red light and light；When
When battery is fully charged, because there is lesser electric current to flow through current-limiting resistance R1, lesser voltage difference is formed on current-limiting resistance R1, this
Voltage difference cannot allow PNP triode Q1 to be connected, and since PNP triode Q1 is not turned on, so first anode D1 is just without electricity
Stream flows through, then red light cannot be lighted, has electric current to flow through second plate D2 at this time, so the blue lamp of common cathode two-color diode D
It lights.The electric current of current-limiting resistance R1 is flowed through by detecting, to control the on state of PNP triode Q1, so that it is double to control common cathode
The color change of color diode D, due to only detecting the electric current of current-limiting resistance R1 circulation, during the charging process, from general supply stream
The curent change for entering each branch USB interface 2 is smaller, so its detection accuracy is high, and more suitable for more mouthfuls of chargers, and at this
In embodiment, common cathode two-color diode D is arranged in 1 outside of shell, meanwhile, each USB interface 2 is correspondingly arranged on corresponding total
Negative two-color diode D, most preferably, common cathode two-color diode is in its corresponding 2 upside of USB interface, in order to identify corresponding USB
The charged state of interface 2.
It is equipped with master control switch 10 on the outside of shell 1 preferably, power conversion module 4 is Switching Power Supply in the present embodiment,
Master control switch 10 is electrically connected with the input terminal of the power conversion module 4, is controlled by a key switch and is increased its property easy to operate.
In the present embodiment, preferably, shell 1 uses aluminum alloy materials, so that being unlikely to deform, increase service life, and
1 side of shell is provided with thermovent 11, reduces the heat generated when work.
In the present embodiment, preferably, charging indication 30 is additionally provided with fuse RT1, the one end fuse RT1 and limit
Leakage resistance electrical connection, the fuse RT1 other end are electrically connected with the emitter of the PNP triode Q1, when USB port accesses circuit
When there is short circuit, fuse RT1 because there is high current to flow through, fuse RT1 and disconnect, play a protective role, when short circuit is cancelled
When, electric current restores reset condition, which works normally.
The above content is only the better embodiment of the utility model, for those of ordinary skill in the art, according to this
The thought of utility model, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be understood
For limitations of the present invention.
Claims (5)
1. a kind of more mouthfuls of chargers with charging instruction, it includes shell, and the shell upper end is equipped with several USB interfaces,
It is characterized in that, the shell in be equipped with power conversion module and power supply circuit plate, the output end of the power conversion module with
The input terminal of power supply circuit plate is electrically connected, several described USB interfaces are electrically connected with the output end of power supply circuit plate, several institutes
It states USB interface and has been electrically connected charging indication；The charging indication includes PNP triode Q1, current-limiting resistance R1
With common cathode two-color diode D, the common cathode two-color diode include for control red light work first anode D1 and for controlling
One end second plate D2, the current-limiting resistance R1 of blue lamp work processed is electrically connected with USB interface, the current-limiting resistance R1 other end
With the base stage of the PNP triode Q1, the base stage of the PNP triode Q1 draws a ground line, the collection of the PNP triode Q1
Electrode is electrically connected with the first anode D1, and the second plate is electrically connected with current-limiting resistance R1 and power supply circuit plate, described
The emitter of the minus earth of common cathode two-color diode D, the PNP triode Q1 is electrically connected with power supply circuit plate.
2. a kind of more mouthfuls of chargers with charging instruction according to claim 1, which is characterized in that the power supply turns
Mold changing block is Switching Power Supply, and the hull outside is switched equipped with master control, and the master control switch is defeated with the power conversion module
Enter end electrical connection.
3. a kind of more mouthfuls of chargers with charging instruction according to claim 1, which is characterized in that the shell is adopted
With aluminum alloy materials, the shell side is provided with thermovent.
4. a kind of more mouthfuls of chargers with charging instruction according to claim 1, which is characterized in that the charging refers to
Show that circuit is additionally provided with fuse RT1, the one end the fuse RT1 is electrically connected with current-limiting resistance, the fuse RT1 other end with
The emitter of the PNP triode Q1 is electrically connected.
5. a kind of more mouthfuls of chargers with charging instruction according to claim 1, which is characterized in that the common cathode is double-colored
Diode D is arranged in hull outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920132985.1U CN209313480U (en) | 2019-01-25 | 2019-01-25 | A kind of more mouthfuls of chargers with charging instruction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920132985.1U CN209313480U (en) | 2019-01-25 | 2019-01-25 | A kind of more mouthfuls of chargers with charging instruction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209313480U true CN209313480U (en) | 2019-08-27 |
Family
ID=67681261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920132985.1U Expired - Fee Related CN209313480U (en) | 2019-01-25 | 2019-01-25 | A kind of more mouthfuls of chargers with charging instruction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209313480U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129844A (en) * | 2019-12-31 | 2020-05-08 | 联想(北京)有限公司 | Power supply equipment and method |
-
2019
- 2019-01-25 CN CN201920132985.1U patent/CN209313480U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129844A (en) * | 2019-12-31 | 2020-05-08 | 联想(北京)有限公司 | Power supply equipment and method |
| CN111129844B (en) * | 2019-12-31 | 2022-03-25 | 联想(北京)有限公司 | Power supply equipment and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190827 Termination date: 20210125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |